190 HEPATIC^. 



Prionolobus Turner! {Hook.), Spruce. 



Jungermania Tio'neri, Hook. Brit. Jung. t. 29 (1816). 



Anthelia Turneri, Dum. Recueil, p. 18 (1835). 



Cephalozia Tarneri, Lindb. in Journ. Linn. Soc. xiii. (1873) ; Spruce, On Cepha- 



lozia, p. 71 (1882). 

 Prionolobus Tarneri, Spruce, Hep. Am. et And. p. 508 (1885). 



Monoicous and dioicous, aero- (rarely clado-) carpous, depresso- 

 csespitose, eflagelliferousj small, fragile, pale reddish colour, at the 

 apices greenish. Stems prostrate at the base, subradiculose. 

 assurgent, subramose, branches lateral, rarely postical, pol}^- 

 phyllous, terete. Cells of the stem pluristratose, very delicate, 

 interior opaqne, cortical similar, slightly larger, subpellucid. 

 Leaves pectinate-distichous, close and equitant, to about the 

 middle or more complicate-bilobed, the whole margin irregularly 

 acutely dentate-serrate, often doubly so, lobes ovate or ovate- 

 lanceolate, acute or apiculate, antical lobe erect and subparallel 

 with the stem, postical (a little broader), patent at an angle of 

 about 60°, cells small to minute, quadrate-hexagonal, plane, 

 beautifully guttulate, walls and angles strongly thickened, no 

 trigones, slightly endochromic. Stipules none. Flowers ? terminal, 

 often on elongated branches, innovations wanting. Bracts 1-3 

 pairs, the innermost almost twice the size of the leaves, connate 

 at the antical base, spinose-dentate, bilobed, lobes subacuminate, 

 acute ; bracteole highly connate with the adjoining bract, ovate, 

 subacuminate, entire or bilobed, spinose-dentate. (Leaves next 

 to the outer bracts a little larger than the others, free at the base, 

 no folioles added.) Perianth projecting much beyond the bracts, 

 delicate, composed of a single layer of cells, about 90 round the 

 middle (except at the base and the angles, where there are some- 

 times two layers) linear (at the base a little narrow), pentagonal - 

 prismatic, keels somewhat high, apex rotuudate, mouth almost 

 closed, obscurely ciliolate, ciliola very narrow, long, hyaline. 

 Cal3q3tra delicate. Capsule oval. Androecia on the same or often 

 on different stems, occupying the middle of the branch ; perigonial 

 bracts assurgent, several pairs, somewhat similar to the leaves, 

 sometimes larger ; antheridia single, oval. 



